Improvement in gin-saw-filing machines



'2 Sheets- Sheet 1.

A. SY. EASTHAM. Gin-Saw Filing-Mullins.

No. 207,957. Patented Sept. 10,1878.

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' 2 Shegts-Sheet 2. A. S.YEASTHAM. Gin-Saw Filing-Machine.

Patented Sept. 1o, 187s.

INVENTOR SESOV weighted lever J, whose forward extremity engages with the nut 7c upon the tapped pin or stud k1, which latter is secured to the box 7a2. This bar has free sliding movement within the vertical guides 7c3, and carries the forward extremity of the rotary file-shaft. The rear body of lever J works in an upright guide, H', which is provided with a transverse hole, h2, in which a pin, h3, may engage, so as to allow the said lever to rest thereon; then, by the adjustment of the screw-nut k on the screwpin k1, which is secured to the sliding box k2, the circular file may be set to any circle of the saws on the saw-cylinder, and the file will continue to cut till the rear end of the lever rests upon the pin in the guide. This causes all the saws to be brought to the same circle to which the file is set, as desired. Vhen this is not desired the pin is removed from the guide and the weight on the tile shaft is moved or adjusted so as to cause the le to cut the desired depth or length of the tooth.

A pin or lug, c, upon the side of the main driving-wheel operates the rocking lever L, so that the revolution of said wheel will cause the rocking lever to engage with the weighted lever, to cause the circular le to drop from contact with the giu-saw at a time prior to the movement of the feeding mechanism which rotates the saw.

The head-block M partially embraces the main driving-shaft, and carries the three shafts respectively of the two lever-wedges N and the feeding device l?. These shafts are provided I with the tubular connecting-links p and setscrews pl, which allow the feed-hand and the leverwedges to be longitudinally adj usted within said tubular links. -This head-block is adapted to be operated by cams m, formed respectively on the two sides of the same. The return of the head against the shaft, after its proper operation by said cams, is caused by the recoil-spring N but,in order to guard against any accident or failure of this spring to return the head-block by reason of j amming` of the parts, a cam or stud, u, is formed upon the shaft, and is adapted to engage with the rear wall of the slots a'. This latter slot is made in the lower body portion of the eccentric-head, and thus a positive force may be brought to bear upon the head in returning it rearward against the driving-shaft.

The drag or check pawl P1 is loosely pivoted to a suitable support, p2, and is provided with a spring, P2, which may be maintained at any longitudinal angular inclination to the pawl by means of the set-screws p3. This pawl may engage with any of the several teeth below the feed-hand, as may be suitable, and is designed to prevent the saw from being fed or rotated forward more than one tooth at a time under any circumstances. This drag or pawl is not raised or lowered, but keeps its position as the saw is set. It rests against the periphery of the teeth, embracing several, and drags against the teeth as the saw is moved.

The outwardlyprojecting arm Q bears against the side of the saw, so as to receive the strain or force imposed upon the latter by the operation of the rotary file, and thus maintains the saw in true and constant position. The file-rod connections G are adapted to be longitudinally adjusted by means ofthe tubular connecting-links g and set-screws g. The boxes R, through which the rods Gr' pass, are provided with the upper and lower spiral springs, r, which provide a vertical cushioned bearing for said boxes, so that the three-cornered reciprocating files S may adjust themselves to the irregularities ofthe different teeth.

It is evident that, in substitution for these spirals, elliptic springs, secured in proper position, will accomplish the same purpose.

The file-rods are provided with guides s, in which the guide-rods s1 work. These latter rods are connected at both extremities with the adjusting-plate s2, which, by means of slots s3 and clamps s, adjust the tiles to the feed as desired.

The forward boxes, in which the filerods work, are pressed laterally outward by springs T, while the tendency of the latter is countcracted at a point of time in the operation of the machine just prior to the action of the saw-feeding device by means of the leverwedges N. These latter have beveled ends,

which wedge against the inner side of the engaging devices t, which latter are secured to said file-boxes, while they are supported just in rear of the same by the guide-supports t.

The pressure of the springs T, which serve to press the three-cornered les` to the saws, is increased or diminished by the tap on the end of the pins respectively tapped into the two front file-rod boxes, and which engage with said springs.

If desired, the rotary file apparatus may be dispensed with, so as to cause the saw-cylinder to be acted upon only by the three-cornered files. The construction and adaptation of parts are such, as described, relative to the operation of the saw-feedin g device, that the latter is caused to act upon the saw subsequent to the action of said wedges, which laterally withdraw the file-boxes. The centrally-pivoted frames W, which support the file-boxes, are adapted to be maintained at any desired plane of vertical inclination by the upright slotted plates 'w and clamps w', while the lower supporting-blocks, X, are vertically adjustable in a straight line by the clamping-bolts y, which work within the slotted standards Y Z. The reciprocating files are, by means of all the foregoing described apparatus, adapted to work in a higher or lower plane, to be presented to the saw at any angular inclination, either and both horizontal and vertical, andV to adjust themselves to any irregularity of the different saw-teeth.

Having fully described my invention, wh at I claim as new, and desire to secure by Letters Patent, is-

1. The combination, with the bed-plate provided with sideguards, of the way-plank formed with the front downwardly-projecting cross-piece, said way-plank being provided with the stop-piece, which is adapted to adjustably determine the forward movement of the bed-plate thereon, substantially as set forth.

2. The combination, with the lever-wedges which act to laterally withdraw the forward filerod boxes, of the eccentric-head, which is intermittently actuated in a forward and return movement by cams formed on the main driving-shaft, substantially as set forth.

3. The combination, with the file-rod boxes, urged laterally outward by suitable springpressure, of the lever-wedges, formed with oblique or beveled ends, and the intermittentacting eccentric-head which actuates said lever-wed ges, substantially as set forth.

4. The combination, with the cam-shaft and eccentric-head, of the saw-feeding device and the lever-wedges, the same being adapted so that the latter shall operate to laterally withdraw the reciprocating files from the saw prior -to the forward movement of the sawfeeding device, substantially as set forth.

5. The combination, with the lever-wedges and the saw-feeding device, of the intermediate connections with the actuating eccentrichead, said connections being adapted to admit of longitudinal adjustment of the leverwedges and saw-feeder, substantially as set forth.

6. The combination, with the lower supporting block, of the centrally-pivoted frame which supports the file-rod boxes, said frame provided with a through vertical slot in its main longitudinal body, in which the segmental pivotal formation of said block works, said supporting-block and pivoted frame being provided with the adjusting-plates and clamping mechanism on both sides of their pivotal connection, substantially as set forth.

7. rlhe combination, with the main drivingshaft having cams formed thereon, of the head-block, which partially embraces the shaft and carries the two lever-wedges, which latter operate to move the file-rod boxes inward, said head-block being intermittently actuated forward by the engagement of the shaft-cams with counter-cams formed on its sides, substantially as set forth.

S. The combination, with the front file-rod boxes, of the lever-wedges, which engage therewith and operate to throw the said boxes inwardly, substantially as set forth.

9. The combination7 with the front tile-rod boxes, which are urged outwardly by spring' mechanism, of the lever-wedges, which are adapted to intermittently engage with and force the spring-pressed boxes' inwardly, substantially as set forth. I

10. The combination, with the intermittent- Aly-reciprocating lever-wedges, of the guides secured to the frames of the file-rod boxes and suitable mechanism for engagement with said boxes, substantially as set forth.

11. The combination, with the intermittently-reciprocating lever-wedges and the bifurcated guides in which the same work, of the engaging devices secured to the respective inner sides of the front le-rod boxes, substantially as set forth.

12. The combination, with the saw-feeding hand and lever-wedges, of the head-block which carries the same, and is adapted by suitable means to be intermittently reciprocated forward and back, substantially as set forth.

13. The combination, with the head-block which carries the saw-feedin g hand and leverwedges, of the shaft adapted by cam-engagement therewith to actuate the same forward and a spring which returns the head-block to its former position, substantially as set forth.

14. The combination, with the head-block, which partially embraces the camdriving shaft and carries both the saw-feeding hand and lever-wedges, of the spring-bar, which has free bearing against its front side, and is adapted to return the said block toits former position upon release from the forward cam action, substantially as set forth.

15. The combination, with the head-block, which has sliding bearing upon a suitable support, and carries both the saw-feeding hand and lever-wedges, of the driving-shaft, provided with forwardlyactuating cams, which latter engage with counter cams formed on said head-block, and the spring return-bar, substantially as set forth. l

16. The combination, with the recessed head-block, which carries the saw-feedin g hand and is formed with avertical slot in its lower longitudinal central body, of the shaft formed with a cam adapted to engage with the rear wall of said slot in case the spring return-bar fails to operate the head-block in its intermittent rear reciprocating movement, substantially as set forth.

17. The combination, with the head-block, which carries the saw-feeding hand and leverwedges, and is made as described, of the driving-shaft formed with both the forwardactua-ting cams and the rear return-cam, substantially as set forth.

In testimony that I claim the foregoing I have hereunto set my hand this 16th day of January, 1878.

ALBERT STANDFIELD EASTHAM.

Vitnesses WM. XV. MANNING, RUFUs HARDY. 

